No Image uploaded creates a 0 byte profile image

If you click to upload an image, but upload nothing, you create a blank 0 byte absence of an image. Prevent that so that it still shows the default image when no image is uploaded

Start by tracing the profile image upload flow and identify where an empty upload becomes a stored profile image. Confirm the behavior when the upload contains no image, then verify that the default image remains visible instead of a 0-byte image.

Written by the indexing model from the issue text.